The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Portrait of Arkady Yartsev. Photo: Kennet Ruona

Arkady Yartsev


Portrait of Arkady Yartsev. Photo: Kennet Ruona

Organometal Halide Perovskite Solar Cell Materials Rationalized: Ultrafast Charge Generation, High and Microsecond-Long Balanced Mobilities, and Slow Recombination


  • Carlito Ponseca
  • Tom J. Savenije
  • Mohamed Qenawy
  • Kaibo Zheng
  • Arkady Yartsev
  • Tobjorn Pascher
  • Tobias Harlang
  • Pavel Chabera
  • Tönu Pullerits
  • Andrey Stepanov
  • Jean-Pierre Wolf
  • Villy Sundström

Summary, in English

Organometal halide perovskite-based solar cells have recently been reported to be highly efficient, giving an overall power conversion efficiency of up to 15%. However, much of the fundamental photophysical properties underlying this performance has remained unknown. Here, we apply photoluminescence, transient absorption, time-resolved terahertz and microwave conductivity measurements to determine the time scales of generation and recombination of charge carriers as well as their transport properties in solution-processed CH3NH3PbI3 perovskite materials. We found that electron-hole pairs are generated almost instantaneously after photoexcitation and dissociate in 2 ps forming highly mobile charges (25 cm(2) V-1 s(-1)) in the neat perovskite and in perovskite/alumina blends; almost balanced electron and hole mobilities remain very high up to the microsecond time scale. When the perovskite is introduced into a TiO2 mesoporous structure, electron injection from perovskite to the metal oxide is efficient in less than a picosecond, but the lower intrinsic electron mobility of TiO2 leads to unbalanced charge transport. Microwave conductivity measurements showed that the decay of mobile charges is very slow in CH3NH3PbI3, lasting up to tens of microseconds. These results unravel the remarkable intrinsic properties of CH3NH3PbI3 perovskite material if used as light absorber and charge transport layer. Moreover, finding a metal oxide with higher electron mobility may further increase the performance of this class of solar cells.


  • Chemical Physics
  • NanoLund: Center for Nanoscience

Publishing year







Journal of the American Chemical Society





Document type

Journal article


The American Chemical Society (ACS)


  • Atom and Molecular Physics and Optics




  • ISSN: 1520-5126